1. Fifth Intern. Cyclotron Conf.;Hartwig,1969
2. Fifth Intern. Cyclotron Conf.;Liesem,1969
3. A method for the resonance-free, low-loss, beam extraction from cyclotrons
4. Extraction from the Jülichi 90 MeV-d+ AEG-Isochironous Cyclotron
5. Fifth Intern. Cyclotron Conf.;Jones,1969